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arXiv · 1112.5661

Coherence lengths for superconductivity in the two-orbital negative-U Hubbard model

G. Litak·T. Ord·K. Rago·A. Vargunin
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Abstract

We study the peculiarities of coherency in the superconductivity of two-orbital system. The superconducting phase transition is caused here by the on-site intra-orbital attractions (negative-U Hubbard model) and inter-orbital pair-transfer interaction. The dependencies of critical and noncritical correlation lengths on interaction channels and band fillings are analyzed.

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G. Litak, T. Ord, K. Rago, A. Vargunin. 2011-12-23. Coherence lengths for superconductivity in the two-orbital negative-U Hubbard model. https://doi.org/10.12693/aphyspola.121.747

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